A collection of datasets from various Dutch institutions to demonstrate a Spatial Data Infrastructure built on Portolan.
Boundaries of 42 zero emission zones (zero-emissiezones) in Dutch cities — areas where vehicle emissions are restricted. These zones are part of the Netherlands' transition to zero-emission urban logistics and cleaner air in city centres.
Two types of zones exist:
Each zone has defined start and end dates, reflecting the phased rollout of emission restrictions across Dutch municipalities.
Provider: Rijkswaterstaat (Directorate-General for Public Works and Water Management) License: Public domain (Dutch government open data)
The data is a GeoParquet file in EPSG:28992 (Amersfoort / RD New). Use DuckDB with the spatial extension.
The file is small (42 features) — loads instantly.
One Mapbox GL v8 style is available for interactive map visualization via the PMTiles file.
Style files are Mapbox GL v8 JSON with relative PMTiles source paths. They can be used with MapLibre GL JS, OpenLayers (via ol-mapbox-style), or any Mapbox GL v8-compatible renderer.
styles/default.json — Zone type classification. Blue fill colored by Soort: dark blue for Zero Emission (ZE/ZES) zones, medium blue for Low Emission Zones (LEZ), light blue for environmental zones (Milieuzone). Labels show city names. Shows where the Netherlands is implementing vehicle emission restrictions.Style files are at: https://data.source.coop/cholmes/portolan-nl/rijkswaterstaat/zero_emissiezones/styles/
Startdatum and Einddatum are timestamps, not date strings — they include time components.LEZ = Low Emission Zone (milieuzone),
ZES = Zero Emissie Stadslogistiek (zero emission city logistics).Shape__Area uses double underscores (ArcGIS convention).Hand-maintained agent guide (ported from this collection's llms.txt in August 2026). Update it alongside collection.json.